Rimuru is building a dungeon in preparation for the upcoming festival. It will feature treasure chests containing weapons made by Kurobe, and Veldora will inhabit the deepest floor as the final boss. Then Milim suddenly shows up with a suggestion...
What is that door?
ما هذا الباب؟
Und was ist diese Tür?
¿Y esa puerta?
¿Y esa puerta?
Où mène cette porte ?
E quella porta?
O que é essa porta?
О, а что это за дверь?